ARTEMIS submersible with the VALKYRIE laser technology to develop a sophisticated cryobot called SPINDLE (Sub-glacial Polar Ice Navigation, Descent, and Lake Exploration). This third phase of the project would be viewed as a precursor to possible future missions to the icy moons of Europa, a moon of Jupiter, and Enceladus, a moon of Saturn, to explore the liquid water oceans thought to be present below their ice, and assess their potential habitability. See also Autonomous underwater vehicle BRUIE DEPTHX IceMole Radioisotope thermoelectric generator References German inventions